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Decrease in fluorescence and phosphorescence intensity of nylon 66 impurities by exposure to ultraviolet radiation
Author(s) -
Brasington Chandis R.,
GadalaMaria F.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070550505
Subject(s) - phosphorescence , ultraviolet , fluorescence , impurity , luminescence , radiation , materials science , intensity (physics) , photochemistry , polymer , ultraviolet radiation , analytical chemistry (journal) , optics , chemistry , optoelectronics , radiochemistry , physics , chromatography , organic chemistry , composite material
The effects of exposure to ultraviolet radiation on the fluorescence and phosphorescence intensity of impurities in nylon 66, sometimes called gel, were measured using color image processing. The fluorescence intensity of the gel particles and of the polymer showed an approximately exponential decay with the time of exposure to ultraviolet radiation, with decay constants in the range 0.5 to 1.0 h −1 . Analysis of images that were acquired over several hours also indicated a decrease in the phosphorescence intensity of the gel particles. Image processing provides a simpler and less expensive method of luminescence analysis than the spectroscopic techniques used previously to examine the effects of exposure to ultraviolet radiation on the phosphorescence properties of nylon 66 impurities. © 1995 John Wiley & Sons, Inc.